To all who thinks these things never happen. Didn't a regional SAAB lose a wheel last year and a B727 lose a wheel a few years age. Wheels aren't the only things to fall off planes. A 737-700 lost an undercarriage spring which hit a house about 2004, and going back further I seem to recall a B747-300 that ripped a bogie out doing a u-turn on the runway in Rome. GA has had its share as well- a couple of emegency exits come to mind (separate incidents). Bits also get left on planes- a g-clamp on a nacelle. Have I missed any operators? I'm also sure you will find many more incidents on a global scale with a bit of searching.
Bottom line is that these things happen for a wide range of reasons. The reasons need to be addressed and the risks minimised to prevent further incidents.
C441- too true.
Clark y